TITLES AND ABSTRACTS OF PAPERS 209 



DEVONIAN OF CENTRAL MISSOURI; FAUNA OF THE COOPER LIMESTONE 

 BY DARLING K. GREGER^ 



(Ahstract) 



This paper includes a disciission of the region in which the formation occurs, 

 its lithologic character and distribution as defined by Meek and Swallow, a 

 description of the fauna and correlation of the formation. 



The foll()wiiii>' papers were read ]))• title: 



ALBERTELLA FAUNA 

 BY CHARLES D. WALCOTT 



SOME FUNDAMENTAL POINTS IN THE CLASSIFICATION OF TRILOBITES 

 BY PERCY E. RAYMOND 



At 1.30 p. m. the Society adjourned. 



SECTION OF VERTEBRATE PALEONTOLOGY 



The minutes of the meeting of the vertebrate paleontologists with the 

 general society at Albany, Wednesday afternoon, December 27, are given 

 on a preceding page. At this session papers dealing with verteljrate 

 paleontology, but of general interest, were presented, the special papers 

 being reserved for the sectional meeting at ^NTew York City. 



Session of Tliursday^ December 28 ^ 



At the American Museum of Natural History, Thursday, December 28, 

 at 10 o'clock. Doctor Matthew called the section to order for the reading 

 of papers, the general Ijusiness session being postponed to Friday after- 

 noon. The following papers were presented: 



FOSSIL MAMMALS FROM PORTO RICO 

 BY H. E, ANTHONY 



{Al)stract) 



A discussion, illustrated by lantern slides, was given of the cave deposits of 

 the island, in which were found the remains of ground-sloths, hystricomorph 

 rodents, and a peculiar type of insectivore, besides birds, bats, etcetera, more 

 nearly related to continental mammals. The deposit is of late Pliocene or 

 early Pleistocene age. 



Introduced by E. B. Branson. 



Prepared from the minutes of the session l)y W. D. Matthew and E. \u. Troxell. 



